Turning now to some big changes coming to the food you eat. For the first time in 20 years the fda is changing nutrition labelsen 0 the back of just about everything you buy at the grocery store. We're talking 700,000 labels. ABC's David Kerley has our story. Reporter: On the back, under a flap, one of these labels adorns much of our food and this morning for the first time in 20 years, a major makeover. This is what you see now and this is what you may be seeing in the future. The calorie count will be much bigger. A new category added sugars, what some call empty calories that you should avoid will be right there on the label. The rollout for the government was accelerated. Maybe that's because it came out of the white house from a first lady who says let's move and eat right. Folks are really starting to think about what they eat and how active they are. So they're scrutinizing labels. They're asking questions. Reporter: But some of the most striking changes come in serving sizes. They will try to reflect how we really eat. Eight ounces of soda is considered a single serving but when is the last time you bought an eight-ounce pop so a 12-ounce even a 20-ounce soda will be considered a single serving and you will get the full calorie count. Ice cream, now it's a half cup a serving. But we eat about a cup on original so that will now be the acceptable size. Muffins now a half but we eat the whole thing. So the serving size will be a full muffin. Same for bagels and toaster pastries but yogurt, it's going down. Right now it's 8 ounces but we eat those 6-ounce cups so the serving size will be reduced. The new label is aimed at trying to help people manage calorie intake, not eat too much sugar and eat more healthy. This is about obesity and trying to help. Even though the white house says this makes a lot of sense. There's undoubtedly will be push-back. You could see some labels in the next year could be mandatory, would be mandatory within the next two years. A 90-day comment period for grocers and manufacturers. That could create a lot of change. News for flyers now. Some may not like it.

This transcript has been automatically generated and may not be 100% accurate.

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